@melm
The USB cable and USB dongle I have used/recommended would get rid of noise in the square wave. You will never have perfect accuracy until you fit a DAC with a master clock anyway.
To gain some insight, read this: https://forums.anandtech.com/threads/is-usb-a-digital-signal.827488/
USB standards were established to be compatible with all devices that use a USB connection. Otherwise, USB 2.0 would never work for audio.
The USB cable and USB dongle I have used/recommended would get rid of noise in the square wave. You will never have perfect accuracy until you fit a DAC with a master clock anyway.
To gain some insight, read this: https://forums.anandtech.com/threads/is-usb-a-digital-signal.827488/
USB standards were established to be compatible with all devices that use a USB connection. Otherwise, USB 2.0 would never work for audio.